cornfedkiller
WKR
My guess is that the lid increases the efficiency of the system. I know that my other pots boil faster with the lid on.
You're right. And I suppose in that case, as long as you are just looking for something that sits on top nicely to keep the heat in and you aren't going to try to use it to pour with or strain or anything, the MicroMo lid would work just fine!